Manufacturer description: The Fujifilm Fujinon GF 63mm F2.8 R WR is a 'normal' prime lens designed for the Fujifilm GFX medium format mirrorless system. Its construction comprises of 10 elements in 8 groups, with 1 ED element. The lens was designed with resolution performance in mind, and the front group focus mechanism reflects this prioritization. Size remains small for the format, with a weight of just 405 grams.